摘要
采用理论分析、数值模拟及数据分析等方法研究“断层-褶皱”构造区应力分布特征和巷道冲击机制,模拟地质因素对构造静载应力的影响特征,揭示了构造区巷道冲击失稳规律。研究结果表明:“断层-褶皱”构造区巷道受支承压力、构造应力及采掘动载扰动,围岩叠加载荷超过其临界应力而诱发冲击显现;“断层-褶皱”构造应力场呈非对称分布,断层上盘构造应力峰值、分布范围更高,分别为43.86 MPa和230 m;地质因素模拟显示“断层-褶皱”构造应力集中度最高,断层倾角65°时构造应力接近峰值,构造应力峰值与煤层弹性模量成正比,与煤层厚度成反比;冲击前巷道微震集中分布于断层下盘0~20 m和上盘0~40 m,与高静载应力区域重合。
The stress distribution characteristics and roadway rock burst mechanism in the “fault-fold” structural area were studied using the methods of theoretical analysis, numerical simulation, and data analysis. The influence characteristics of geological factors on tectonic stress were simulated, and the law of roadway rock burst in the structural area was revealed. The results show that: The roadway in the “fault-fold” structural area is disturbed by abutment pressure, tectonic stress, and mining dynamic stress, and the superimposed stress of surrounding rock exceeds its critical stress to induce rock burst. The “fault-fold” tectonic stress field is asymmetrically distributed, and the peak value and distribution range of tectonic stress in the hanging wall of the fault is higher, which are 43.86 MPa and 230 m, respectively. The results of the geological factors simulation show that the “fault-fold” tectonic stress concentration is the highest, and the stress value is close to the peak when the fault dip angle is 65°. The tectonic stress is proportional to and inversely proportional to the elastic modulus and coal seam thickness respectively;Before rock burst, the microseisms were mainly concentrated in the footwall 0-20 m and hanging wall 0-40 m of fault, which coincided with the high static load stress area.
作者
王联合
曹安业
郭文豪
窦林名
温颖远
薛成春
胡阳
吕大钊
WANG Lianhe;CAO Anye;GUO Wenhao;DOU Linming;WEN Yingyuan;XUE Chengchun;HU Yang;LYU Dazhao(School of Mines,China University of Mining and Technology,Xuzhou,Jiangsu 221116,China;Shaanxi Coal Industry Co Ltd,Xi'an,Shaanxi 710077,China;Jiangsu Engineering Laboratory of Mine Earthquake Monitoring and Prevention,China University of Mining and Technology,Xuzhou,Jiangsu 221116,China;Shaanxi Binchang Mining Group Co Ltd,Xianyang,Shaanix 713600,China)
出处
《采矿与安全工程学报》
EI
CSCD
北大核心
2023年第1期69-81,90,共14页
Journal of Mining & Safety Engineering
基金
国家自然科学基金项目(51734009,51674253)
山东省重大科技创新工程项目(2019SDZY02)。
关键词
“断层-褶皱”构造
巷道冲击
非对称应力场
主控因素
微震规律
“fault-fold”structure
roadway rock burst
asymmetric tectonic stress
main control factors
microseismiclaw
